X-ray dental film packet



March 24, 1942. s HERMAN X-RAY DENTAL] FILM PACKET Filed May 6, 1941 INVENTOR. 9 40 4. HAW/41v.

mm a. w

ATTORNEY.

Patented Mar. 24, 1942 X-RAY DENTAL FILM PACKET Samuel A. Herman, New York, N. Y., assignor to Dentists X-Ray Film Company, a firm, New

York, N. Y.

Application May 6, 1941, Serial No. 392,074

2 Claims. (Cl. 25069) This invention relates to improvements in packets used to contain sensitized X-ray dental films adapted for insertion into the mouth, whereby the condition of the teeth may be ascertained from examination of the developed films.

When a dental practitioner has a number of such film packets, it becomes desirable, even necessary, to identify each film so that after exposure, and subsequent toning, it is readily distinguishable by indicia, as a numeral, symbol, name, etc.

Manifestly, it is not possible to place such mark on the film directly, as it would interfere with the skiagraph taken.

Having this matter in mind, it has been an object of this invention to provide a film, having an emulsion on one or both sides, and a tag portion at one end capable of receiving an inscription and retain the same, so as to clearly appear on the tag when the film has been developed.

A further feature is in the provision of means for permanently imparting such indicia to the tag on the film.

Another purpose is to produce a film carrying packet of suitable proportions, light in weight, substantially moisture proof and inexpensive to manufacture.

sheet be used, there is placed on it a sensitized film 20 having a bendable tag 2| at one end adapted to be folded thereover along the creased line 22, and incised corners 23 at its junction, both film and tag'being coated on one or both sides with emulsion.

If the sheet I9 is not used, the film is disposed directly on the wrapper, with the tag uppermost, and, while the tag has been shown as integral with the film, it may be a separate entity attached in any preferred manner. v

Interposed between the outer face of the film and inner face of the tag, is a thin sheet of lead, or equivalent shielding substance 24, capable of intercepting X-rays, thus guarding the film, but not the tag.

Another sheet of ordinary actinic light proof paper 25 may be disposed over the lead sheet 24, I

or not as preferred, this sheet being carbon coated transfer paper, that is, a paper sheet I coated on one side with finely divided, flour-like These important objects are accomplished by 5 the novel construction, combination and arrangement of parts hereinafter described, and illustrated in the accompanying drawing, constituting an essential component of this disclosure and in which:

Figure 1 is an expanded plan view of the several parts constituting the improved film packet.

Figure 2 is a perspective View of the film used therein.

Figure 3 is a plan view of an embodiment of the invention, parts being broken away to show the construction.

Figure 4 is a transverse sectional view, taken on line 44 of Figure 3, drawn to an exaggerated scale.

Referring in greater detail to the drawing, the numeral l5 designates the wrapper, or main portion of the envelope, which consists of a flat sheet of heavy, dense paper, proof against ordinary actinic light.

The sheet is generally an elongated rectangle having diagonal corners l6 from which project tabs l 1 adapted to be folded inwardly, as are also the four marginal edges on the bending lines l8.

There may be disposed on the inner surface of the wrapper, a sheet H! of opaque, light impervious paper, having rounded corners, and, if such particles of carbon, such as lamp black, held to the paper by the usual means in commercial carbon paper, it being understood that the carbon coating is placed over the upper surface of the film tag.

A thin sheet of lead foil may be substituted for the carbon paper, the foil being readily disruptable by the treatment further on described.

A paper label or cover 26, of substantially the same area as the film body and paper sheets, is provided with a transverse slit 21, shown as ex-. tending centrally across for approximately two thirds the ,entire width of the cover, and preferably reaching from the ends of the slit to the rounded corners at one end, are lines of perforations 28.

The flap 30, formed by the slit 2'! and perforated lines 28, and also the under surface of the cover, may be charged with carbon particles, in the manner of ordinary carbon paper, in which case, the carbon sheet 26 or lead foil can be dispensed with.

The elements I9, 20 and 24 are assembled on the Wrapper I5, the tag 2| folded thereover, the leaden sheet 24 inserted between the folds, and then the carbon applied over the folded tag, whereupon the marginal edges of the wrapper [5 are inturned, together with the tabs l1, and the label 26 secured in place thereover by any preferred adhesive along its marginal edges.

In operation before, or after, the exposure has been made, but before development, any inscription desired is made on the flap 30 by a sharp, but not keen pointed instrument, as a stylus,

ball pointed pen or lead pencil, the same being used with sufficient pressure as to cause the carbon particles below the flap, or on the element 25, to spread and separate, so that clearly inscribed lines are made in the carbon, through which light will pass to form a permanent inscription on the tag 2! only, the main portion of the film being protected from all visible light, due to the insertion of the lead plate 24 between it and the tag.

If lead foil be used, in place of the carbon transference, the metal of the foil will be displaced in the manner of the carbon particles on the paper or label.

Should the lead foil or a separate carbon sheet be used, it is preferable to turn the flap 30 back while making the inscription.

In opening the package, any convenient object is inserted in the slit 2! and the flap 30 tom along the perforated lines 28.

From the foregoing, it will be seen that a simple device for this purpose has been disclosed in the preferred form of its embodiment, but it is not desired to restrict the details of the exact construction shown, it being obvious that changes may be made without departing from the scope of the appended claims.

Having thus described the invention, what is claimed as new and desired to secure by Letters Patent, is:

1. A dental film packet comprising an envelope having a label on one side, said label having a central transverse slit of substantially two-thirds of its Width and perforations leading from the ends of the slit to two of its adjacent corners constituting a tearing portion, a coating on said portion of dispersible pigment adapted to splay apart upon the application of pressure applied by a sharp instrument, a sensitized film disposed below said label, a tag on said film and a leaden shield between the tag and main body of the film, all of said elements being enclosed Within said envelope.

2. A dental film packet comprising an envelope for a sensitized film, a sensitized tag associated with said film, a sheet of lead interjacent said tag and film, a label attached to said envelope acting as a cover and having a disruptable portion over said tag, and a sheet of lead foil intermediate said tag and the disruptable portion of said label.

SAMUEL A. HERMAN. 

